/**
 * #      771
 * 名称   宝石与石头
 * 链接   https://leetcode-cn.com/problems/jewels-and-stones
 * 题解   [956](https://leetcode-cn.com/problems/jewels-and-stones/solution)
 * 通过率 85.1%
 * 难道   简单
 */

